RCF SUB-8004AS Active 18" Powered Subwoofer


RCF SUB-8004AS Active 18" Powered Subwoofer

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  • 2500 Watt Peak, 1250 Watt RMS
  •  136 dB max SPL
  •  30 Hz - 120 Hz frequency response
  •  18" Woofer, 4.0" voice coil vented woofer
  •  DSP controlled Input section with selectable presets
  •  Delay control
  •  Baltic birch tour grade cabinet
  •  Compatible with NXL23-A (stacking)
  •  Compatible with NXL24-A (stacking)
  •  Multiple configurations with HDL 10-A and HDL 20-A

The SUB 8004-AS is one of the most powerful 18” subwoofers in pro-sound category. Featuring a high power, hypervented 18” woofer, with 4” inside/outside voice coils, this cabinet is designed to deliver a serious amount of low frequency. Powered by a 1250W digital amplifier module, the SUB 8004-AS can perform in the most demanding situations. The input board includes volume control, deep/punch switch, high pass switch, phase switch, cardioid, time delay.


RCF's Class-D power amplifier technology packs huge performance operating with high efficiency into a lightweight solution. RCF amplifiers deliver an ultra-fast attack, realistic transient response, and impressive audio performance. The amplifier features a solid machined aluminium structure which not only stabilises the amplifier during transportation but also helps the fan-less heat dissipation. All the amplifiers present SMPS power supply section to produce maximum output and minimum weight.


RCF specialises in developing advanced transducer technology including the application of high-tech materials such as Neodymium, Carbon Fiber, Pure Titanium, Kevlar, Kapton and Mylar hybrids. With over 60 years of design and manufacturing experience in the market, RCF has been instrumental in technological inventions such as carbon fiber cone molding, double silicon spiders, inside/outside voice coil windings to edge wound voice coil manufacturing and pure titanium diaphragm forming. Our latest developments have resulted in designing state of the art neodymium magnetic circuits, radically new voice coil ventilation systems and ground breaking direct drive voice coil assemblies.


RCF subwoofers are the first choice of many sound engineers, thanks to the very high SPL levels at very low frequencies, small dimensions compared to the competitors, self- powered design, internal delay control, cardioid configuration options and impressive size/weight to SPL output ratio. Your crowd will be able to live an engaging immersive experience.


The RCF cabinets are made of baltic birch plywood coated with a textured black finish. The subs are stackable and light-weight, for easy set-up and tear down, thanks to the ergonomic handles. A pole receptacle on top and side allows the use of the box in various configurations. The powder coated front grille integrates a special transparent-to-sound foam backing on the inside to further protect the transducers from dust.

SUB 8004-AS Professional Series Active Subwoofer (Black)

Frequency Response 30 to 120 Hz
SPL Maximum 136 dB
Woofer 1 x 18.0" (457.2 mm), 4.0" (101.6 mm) voice coil
Input Signal Impedance: Balanced/unbalanced
Input/Output Connectors XLR
Input Sensitivity -2 / +4 dBu
Crossover Frequencies Selectable 90 Hz to 120 Hz
Protection Thermal-RMS
Limiter Fast
Controls Xover, phase switch, deep/punch, output delay settings, Cardioid
Total Power 2,500 W Peak / 1,250 W RMS
Cooling Convection
Connection Powercon in/out
Cabinet Baltic birch
Hardware 2 x M20, 4 x wheels mounting points
Handle 2 on side
Color Black
Dimensions (H x W x D) 22.56 x 21.95 x 27.56" (709.00 x 700.00 x 1,109.00 mm)
Weight 112.20 lb (51.00 kg)
Packaging Info
Box Dimensions (LxWxH) 31 x 30 x 25"



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  • Ground shipping is free (orders over $40)
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